<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        body{
            margin: 0;
            padding: 0;
        }
    </style>
</head>
<body>
    <div id="app">
        {{msg}}<input type="text" v-model.trim="msg">
    </div>
</body>
</html>
<script src="./vue.js"></script>
<script>
    new Vue({
        el:'#app',
        data(){
            return {
                msg:'老妹'
            }
        },
    })
</script>